According to Ngram it used to be far more common in British English (not surprising, IMO), but has become much less so. The second least played word in the puzzle (emend) was played by 265 players; demesne by only 91 players. A candidate for reclassification?

The word login is classified as a common word. Whilst playing a 'Your Puzzles' game, I entered logout and found it wasn't common. Methinks the pair should be treated the same. What do others think?

overchi — when you have twenty or more words past the 'Best' on the way to 'Maven' and still have a double-digit number of common words left to be found and played
 

When typing the first letter R for a word, the non-highlighted R was used before the highlighted one. This was with two different browsers. I had my much better half check from her computer and she had the same experience.

I had this happen recently on a Your Puzzles.

It doesn't affect play at all, but it is curious.

From https://www.bbc.com/news/world-asia-56553790

Police said an explosion erupted as two attackers tried to enter the church on Palm Sunday, the first day of Easter.

Appalling. I expected better from the BBC.

I don't think I've seen such an extreme bar graph at the bottom of the Scoreboard with rare words not shown: exponential growth from fewest to most common words found. And the huge number of rosettes reflects it. Good show to all who played.

The other day sandcastle was the seed word. I would spell it as two words. Despite the observation that American English is more likely to combine separate words into a compound word, it appears in this case British English has a strong preference for a single compound word whereas American English has a slight preference for two separate words.

It is an anagram from the military pronounced as a word: total inability to support usual performance.